“Dateline NBC” (NBC at 8 p.m.) tells the story of Mary Evans, a woman who was harmlessly looking for old neighborhood friends on Facebook when she stumbled upon a shocking and long-buried truth about two brothers she once knew.
After being on hiatus since September, “Unforgettable” (CBS at 8) is back to wrap up its second season with Carrie and Al posing as a married couple to catch a killer.
Ahead of its fourth-season premiere on April 15, “Pioneers of Television” (WETA at 8:30) digs back in its archives to air their special on trailblazers in sitcoms. Actors Andy Griffith, Marlo Thomas and Mary Tyler Moore reminisce about their respective shows.
SERIES PREMIERE: Each week on “Showdown of the Unbeatables” (Nat Geo at 9), two supposedly indestructible products face off. In the premiere, a giant jackhammer is pitted against a safe lined with cement and ballistic steel.
“Shark Tank” (ABC at 9) hears pitches from three New Jersey natives who think they have a product that will revolutionize the painting industry, two Austin moms marketing a micro, portable mat and a pair of Harvard Business School grads who want the Sharks to take notice of their innovative way to make healthful meals easier.
FINALE WATCH: The fourth-season finale of “Raising Hope” (Fox at 9) will serve as the series finale, with the quirky family comedy taking a final bow in an hour-long closer that has both a wedding and a performance from Kenny Loggins.
An unexpected ally swoops in to help Adalind and her baby leave Europe safely on “Grimm” (NBC at 9).
The half-hour documentary “Bruce Springsteen’s High Hopes” (HBO at 9:30) details the making of the singer-songwriter’s most recent record, “High Hopes.”
“Live From Lincoln Center” (WETA at 9:30 and MPT at 10:30) brings us a performance from Tony Award-winner James Naughton, who will perform some of Randy Newman’s most memorable songs.
The Chesapeake Ripper looks to be back on the scene when a city councilman’s body is discovered wrapped in a tree on “Hannibal” (NBC at 10).
Radio and television host Bill O’Reilly and actor Anthony Mackie come to “The Tonight Show Starring Jimmy Fallon” (NBC at 11:35), with a performance from Sky Ferreira.
Actors Billy Crystal and Tony Hale are on the “Late Show With David Letterman” (CBS at 11:35), with music from Liv Warfield.
Actors Julia Louis-Dreyfus and Michael Pena swing by “Jimmy Kimmel Live” (ABC at 11:35), with a musical performance from London Grammar.